JPS5813245Y2 - Remaining hot water display device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a remaining hot water display device that notifies the amount of hot water remaining in the body of a late-night electric water heater by lighting a lamp and sounding a buzzer.

FIG. 1 is a diagram showing the positional relationship of thermostats attached to the side of a conventional late-night electric water heater.

In this Figure 1, 1 is the adult water heater, 2 is the water inlet, and 3 is the water heater.
Reference numeral denotes a hot water supply port that leads the hot water stored in the adult body 1 to the outside, 4 a heater to which late-night electricity is applied to heat the water stored in the adult body 1, and 5 to 7 bimetal type thermostats.

These thermostats 5 to 7 are for sensing the water temperature inside the adult body 1.

FIG. 2 is a diagram showing a wiring circuit for the thermostats 5 to 7 attached to the side surface of the water heater unit 1 of FIG. 1 and a lamp for displaying the amount of remaining hot water.

As is clear from FIG. 2, the lamps 9 to 11 and the thermostats 5 to 7 are each connected in series and connected to a DC power source 8.

When the thermostats 5 to 7 reach their respective set temperatures, these thermostats 5 to 7 are short-circuited, and the lamps 9 to 11 are turned on, respectively.

Next, we will explain the operation of the conventional remaining hot water display device.
Water is supplied into the adult body 1 from a water supply port 2, the supplied water is converted into hot water by a heater 4 using late-night electricity, and hot water is supplied from a hot water supply port 3.

Moreover, when all the water in the adult body 1 is changed to hot water by the heater 4, the contacts of the thermostats 5 to 7 are short-circuited, so that the lamps 9 to 11 in FIG. 2 are lit, indicating that there is a large amount of remaining hot water.

Next, by using the hot water in the adult body 1, water is supplied from the water supply port 2 accordingly, so that the temperature of the hot water at the thermostat 7 first decreases.

Therefore, the contacts of thermostat 7 open and lamp 1
1 goes out.

Furthermore, when the amount of hot water in the compacted body 1 decreases, water is supplied into the compacted body 1 from the water supply port 2, the temperature of the hot water at the thermostat 6 decreases, and the contacts of the thermostat 6 are also opened.

As a result, the lamp 10 is also turned off.

Similarly, when the temperature of the hot water at the thermostat 5 also decreases, the contacts of the thermostat 5 are opened and the lamp 9 is turned off.

In this way, it is shown that the amount of hot water remaining is low.

As mentioned above, in the conventional remaining hot water display device, temperature sensing elements such as a plurality of bimetallic thermostats are attached to the side of the compact body 1, and lamps 9 to 1 are connected to the thermostats 5 to 7.
1 were connected in series and connected in parallel, and the amount of remaining hot water was displayed in stages by turning off the lamp.

Therefore, the remaining hot water is displayed only on lamps 9 to 11, so when you are working hard or are not paying attention to turning on and off the lamps, the hot water in the compact body 1 may be used up. Sometimes I don't notice it.

This idea was made to eliminate the above-mentioned drawbacks of the conventional method.When the desired amount of hot water is reached, a buzzer sounds for a certain period of time, and a buzzer is used at the same time as a lamp to indicate that the amount of hot water is low. An object of the present invention is to provide a remaining hot water display device that can reliably detect the amount of remaining hot water both visually and aurally.

Hereinafter, embodiments of the remaining hot water display device of this invention will be described based on the drawings.

FIG. 3 shows a reduced form applied to one embodiment of the present invention, which is exactly the same as the conventional case shown in FIG. 1, so its explanation will be omitted, but the thermostat shown in FIG. In place of 5, a thermostat 12 is attached to the side surface of the compact body 1.

This thermostat 12 has a back contact.

- Figure 4 shows thermostat 6.7.12 and lamp 9.
This figure shows a wiring diagram of the remaining hot water display device of the present invention using 11 to 11 and a buzzer 13, etc. In FIG.

The thermostat 6.7 and the lamp 10.11 each connected in series are further connected in parallel, and both ends of the parallel circuit are connected between the positive and negative poles of the DC power supply 8, as shown in Figure 2. The same is true.

This invention differs from the one shown in FIG. 2 in that the thermostat 12 and the buzzer 13 are used as described above, and the common terminal COM of the thermostat 12 is connected to the positive terminal of the DC power supply 8.

In addition to the common terminal COM, this thermostat 12 has
Terminals a, l) (back contacts) are provided, and terminal a
is connected to the negative electrode of DC power supply 8 via lamp 9.

Similarly, the terminal is connected to the negative pole of the DC power supply 8 via the buzzer 13.

The contact of the thermostat 12 is always connected to the terminal a, and when the set temperature is reached, the contact is switched to the terminal a.

Next, the operation of the remaining hot water display device of this invention constructed as above will be explained.

First, the operations of the thermostat 6.7 and the lamp 10.11 are the same as in the conventional case described in FIG. 2, so their explanation will be omitted.
When the temperature of the hot water in the compact body 1 in the part 2 is at the set temperature, the contact of the thermostat 12 is connected to the terminal a side, and the lamp 9 is lit.

Next, when the temperature of the hot water in the compact body 1 at the thermostat 12 falls below the set temperature, the contact of the thermostat 12 is switched to the terminal side.

As a result, the lamp 9 is turned off, and the buzzer 13 is energized, so that the buzzer 13 sounds for a certain period of time, indicating that the amount of hot water remaining in the shrink body 1 has decreased.

In the above embodiment, a thermostat is used as the temperature sensing element, but the thermostat may be replaced with a semiconductor element such as a thermistor, and an electronic thermostat that electrically detects the temperature may be used. Of course.

As described above, according to this invention, one of the plurality of temperature-sensing elements provided at a predetermined location on the side surface of the contracted body is switched when the temperature of the hot water inside the body becomes below a set value, By turning off the lamp and sounding a buzzer for a certain period of time to notify that the amount of remaining hot water has decreased, the amount of remaining hot water can be known both visually and audibly. Unlike visual display devices that require constant attention, this invention allows you to accurately and reliably know the amount of remaining hot water without having to constantly watch it.

Another advantage is that the lamp and buzzer can be installed at a location away from the compact body and are not restricted by the installation location.

[Brief explanation of the drawing]

Figure 1 is a diagram showing the structure of a water heater using late-night electricity that is equipped with a conventional thermostat for displaying the amount of remaining hot water, Figure 2 is a circuit diagram of a conventional remaining hot water display device, and Figure 3 is a diagram showing the remaining hot water display of this invention. FIG. 4 is a diagram showing the structure of a late-night electric water heater to which an embodiment of the device is applied. FIG. 4 is a circuit diagram showing an embodiment of the remaining hot water display device of this invention. 1... shrinkage, 2... water inlet, 3...
Hot water inlet, 4...Heater, 6,7.12...
...Thermostat, 9-11 ... Lamp, 1
3... Buzzer. Note that the same reference numerals in the drawings indicate the same or equivalent parts.

Claims (2)

[Scope of utility model registration request] (1) Attach multiple temperature-sensing elements to the side of the water heater that uses late-night electricity, and use a thermostat with a back contact to measure the temperature of the remaining hot water using the temperature-sensing element located at the top of the temperature-sensing elements. A lamp is turned on when the temperature exceeds a predetermined value, and when the temperature falls below a predetermined value, a buzzer sounds to notify that the amount remaining in the adult body has decreased. A remaining hot water display device characterized in that a lamp is turned on when the water temperature at a water level is above a predetermined level, and is turned off when the water temperature is below a predetermined level. (2) The remaining hot water display device according to claim 1, wherein the temperature sensing elements other than the topmost one are semiconductor elements such as thermistors.